Share Topic 4- 2x2 Multiplication
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Mr. Luca bought 35 notebooks. Each notebook has 61 pages in it. Use rounding to estimate the total numbers of pages in the notebooks and solve.
40 x 60 = 2,400 pages
The pizza parlor used 40 pieces of pepperoni on each large pizza. The pizza parlor made 80 large pizzas. How many pieces of pepperoni did they use?
40 x 80= 3,200
There are 23 students in Mrs. Lee's class. Each students has a box containing 32 crayons. Use rounding to estimate the total number of crayons in Mrs. Lee's class.
20 x 30 = 600 crayons
Mark's scout troop is building 25 birdhouses. Each birdhouse uses 40 nails. How many nails does the troop need in all?
25 x 40 = 1,000
Solve 50 x 80
4,000
Solve 20 x 50
1,000
There are 15 boxes of math books at ACS. Each box of math books has 21 books. How many math books are there in all?
15 x 21= There are 315 math books at ACS
Mrs. Avery's garden has 14 rows of green flowers. Each row contains 17 green flowers. Write and solve an equation to find the numbers of green flowers in Mrs. Avery's garden.
14 x 17 = 238 Green Flowers
Amy makes $25 dollars a day babysitting. Which expression would you use to find how much money Amy makes if she works 20 days in 6 months?
$25 x 20 = Amy makes $500 in 6 months.
Sam has 32 pages in his stamp album. Each page holds 41 stamps. Sam wants to find how many stamps will fit in his entire album. Which partial product is missing from Sam's work?
80 (40x2)
Sienna drew an area model to find 15 x 24. What are ALL the partial products that would belong in the area model?
10 x 20; 20 x 5; 10 x 4; 4 x 5
A baker's dozen has 13 muffins. Serena ordered 40 baker's dozens. How many muffins did Serena order?
13 x 40= 520 muffins
Solve 54 x 23 =
1, 242
Solve 46 x 63
2, 898
Mrs. Kim had 43 bags of candy. Each bag had 15 candies in each. How many candy did she have in all?
Mrs. Kim had 645 pieces of candy.
